Automobile shock absorber piston rod electroplating hanger, electroplating system and electroplating method

Abstract

The present invention discloses an electroplating hanger, an electroplating system and an electroplating method for a piston rod of an automobile shock absorber. The electroplating hanger comprises: a shielding workpiece used for sleeved on an electroplating section of a Class B diameter to limit the flow of an electroplating solution; the electroplating section of the piston rod comprises an electroplating section of a Class A diameter and an electroplating section of a Class B diameter, and the electroplating section of the Class B diameter comprises an electroplating section of at least one diameter, wherein the diameter of the electroplating section of the Class A diameter is greater than the diameter of all the electroplating sections of the Class B diameter. According to the shielding workpiece correspondingly designed and matched to the electroplating sections of different diameters on the piston rod, the shielding workpiece limits the flow of the electroplating solution of the enclosed electroplating section, so that the electroplating thickness and electroplating range of all the electroplating sections meet the requirements in the same time, thereby realizing the flash plating function. By converting the required current density and electroplating time for the required pre-plating and post-plating dimensions of the electroplating range of the piston rod, the problem of the difficulty of secondary electroplating operation of some existing electroplating production lines is solved by electroplating parameters and controlling the power line density.

Description

Technical Field

[0001] The invention relates to the field of electroplating, and in particular to an electroplating hanger, an electroplating system and an electroplating method for a piston rod of an automobile shock absorber. Background Art

[0002] The development of metal surface treatment technology has gone through a long process, including the period of primitive surface technology with decorative function as the main function, the period of traditional surface technology with protective function as the main function, and the period of modern surface technology with application function as the main function. In the 300-year history of the industrial revolution, in order to extend the service life of metal objects, people have to use their brains and adopt special methods from a scientific perspective to treat them. Many major achievements have been made in the past century. Metal surface treatment technology, such as electroplating and other processes, came into being in developed Western countries and occupied the "throne" of metal surface treatment technology for a hundred years. It uses direct current to precipitate metal from the electrolyte and deposit it on the metal surface to obtain a coating layer.

[0003] Automobile shock absorbers belong to the chassis system and work in a harsh environment. The piston rod is a key component in the shock absorber, so surface treatment is particularly important. During use, not only the strength of the piston rod must be guaranteed, but also the corrosion resistance, wear resistance and appearance of the piston rod surface must be guaranteed. When designing the product, the design is based on the shock absorber piston rod performance requirements provided by the customer's automobile manufacturer. The quality of the piston rod surface treatment (chrome plating) will directly affect the performance and service life of the shock absorber. Summary of the invention

[0004] The invention provides an automobile shock absorber piston rod electroplating hanger, which solves the technical problem that the existing electroplating production line does not have a flash plating function and the secondary electroplating operation is difficult.

[0005] The present invention is achieved through the following technical solutions:

[0006] The present invention provides an electroplating hanger for a piston rod of an automobile shock absorber, the electroplating hanger comprising: a shielding workpiece used for sleeved on an electroplating section of a Class B diameter to limit the flow of an electroplating solution;

[0007] The electroplated section of the piston rod includes an electroplated section with a diameter of type A and an electroplated section with a diameter of type B, and the electroplated section with a diameter of type B includes an electroplated section with at least one diameter, wherein the diameter of the electroplated section with a diameter of type A is larger than the diameters of all the electroplated sections in the electroplated section with a diameter of type B.

[0008] Working principle of this scheme: The electroplating hanger provided by this scheme is mainly used for simultaneously electroplating electroplating sections of different diameters on a piston rod, and the thickness of electroplating of electroplating sections of different diameters can be different; in the prior art, the electroplating method for electroplating sections of different diameters on a piston rod is usually to perform electroplating in sections, and after completing the electroplating of a certain electroplating section, the next electroplating section is electroplated. This not only consumes a lot of manpower and material resources, but is also very inconvenient when performing secondary electroplating; this scheme designs a matching shielding workpiece according to the corresponding electroplating sections of different diameters on the piston rod, and the shielding workpiece limits the flow of the plating liquid around the surrounded electroplating sections, so that the electroplating thickness and electroplating range of all electroplating sections meet the requirements within the same time.

[0009] A further optimized solution is that the shielding workpiece is a hollow cylinder, and the shielding workpiece is provided with flow holes for limiting the flow of the electroplating liquid.

[0010] A further optimized solution is characterized in that, when the electroplating segments of type B diameter include electroplating segments of various diameters, the shielding workpiece includes shielding segments of various diameters corresponding to the electroplating segments of various diameters.

[0011] A further optimization scheme is that the flow hole for limiting the flow of the electroplating solution is a circular hole.

[0012] A further optimization scheme is to evenly open multiple identical vertical direct current holes along the height direction on the protruding cross-section of the connection between the shielding workpiece with the largest diameter and the adjacent shielding workpiece, and the vertical direct current holes connect the upper bottom and the lower bottom of the protruding part of the connection between the shielding workpiece with the largest diameter and the adjacent shielding workpiece.

[0013] The vertical direct current hole connects the upper and lower bottoms of the protruding part of the connection between the shielding workpiece with the largest diameter and the adjacent shielding workpiece. During the electroplating process, when the piston rod and the shielding workpiece are immersed in or taken out of the plating solution together, the plating solution at the connection between the shielding workpiece with the largest diameter and the adjacent shielding workpiece will flow out along the vertical direct current hole, and the plating solution will not accumulate at the connection.

[0014] A further optimization scheme is that the centers of the cross sections of all vertical direct current holes connecting the upper bottom and the lower bottom of the shielding section are on the same circumference.

[0015] The scheme also provides an automobile shock absorber piston rod electroplating system, including a shielding workpiece, a piston rod, an electroplating hanging plate, an adjustment bracket, a positioning and clamping device, and a conductive joint;

[0016] The piston rod is a cylinder with various diameters, the electroplated section of the piston rod includes an electroplated section with a diameter of type A and an electroplated section with a diameter of type B, and the shielding workpiece corresponds to and matches the electroplated section with a diameter of type B;

[0017] The adjustment bracket is horizontally installed on the electroplating hanging plate and can move up and down. The adjustment bracket is non-conductive. At least 4 groups of positioning and clamping devices are evenly distributed and vertically installed on the electroplating hanging plate. All positioning and clamping devices pass through the adjustment bracket and are perpendicular to the adjustment bracket. The conductive connectors corresponding to the positioning and clamping devices are vertically installed at the bottom of the electroplating hanging plate.

[0018] The outer surface of the electroplated cladding is coated with 4mm green groove glue.

[0019] A further optimized solution is that the conductive joint is a hollow cylinder, and the inner diameter of the conductive joint is determined by the diameter of the non-electroplated section of the piston rod.

[0020] A further optimization solution is that the side of the conductive joint is coated with 3 mm of green groove glue.

[0021] A method for electroplating a piston rod of an automobile shock absorber, the method comprising:

[0022] S1. Determine the current density and electroplating time according to the required dimensions of the piston rod before and after electroplating;

[0023] S2. Designing a corresponding shielding workpiece of the piston rod electroplating section according to the determined current density and electroplating time;

[0024] S3. The shielding workpiece is set at the position corresponding to the piston rod;

[0025] S4. Install one end of the piston rod on the conductive joint and the other end in the positioning and clamping device, adjust and fix the positioning and clamping device and the adjustment bracket;

[0026] S5. Control the electroplating parameters and electric line density to start the electroplating work.

[0027] The working principle of this scheme is as follows: the small end of the piston rod is installed into the conductive connector, and the large end is installed into the shielding workpiece and assembled in place. By adjusting the adjustment bracket, the connecting rod of the positioning and clamping device is in the middle position. The piston rod is judged to be qualified if it does not shake when it is gently shaken by hand. Then lock the adjustment bracket. By controlling the electroplating parameters, the electric line density is controlled to disperse from the opening position into the shielding part to produce an electrochemical reaction with the piston rod to form a thinner coating, thereby achieving and meeting the technical requirements for piston rod electroplating. This scheme converts the required current density and electroplating time from the pre-plating and post-plating dimensions of the piston rod electroplating range. By using electroplating parameters and controlling the electric line density, it solves the problem that some existing electroplating production lines do not have flash plating functions and that secondary electroplating operations are difficult, and meets the electroplating size requirements of electroplated sections of different diameters on the same piston rod.

[0028] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0029] 1. The present invention provides an automobile shock absorber piston rod electroplating hanger, electroplating system and electroplating method. According to the different diameter electroplating sections on the piston rod, a shielding workpiece is designed to match the shielding workpiece. The shielding workpiece limits the flow of electroplating liquid around the surrounded electroplating sections, so that the electroplating thickness and electroplating range of all electroplating sections meet the requirements within the same time, thereby realizing the flash plating function.

[0030] 2. The present invention provides an automobile shock absorber piston rod electroplating hanger, electroplating system and electroplating method, which solves the problem of difficult secondary electroplating operation in some existing electroplating production lines by converting the required current density and electroplating time according to the required dimensions of the piston rod before and after plating within the electroplating range, and by controlling the electroplating parameters and the power line density. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention.

[0032] In the attached picture:

[0033] Figure 1 This is a schematic diagram of the structure of the electroplating rack of the present invention;

[0034] Figure 2 Schematic diagram of the piston rod structure;

[0035] Figure 3 This is the main view of the electroplating system structure;

[0036] Figure 4 It is a cross-sectional view of the shielding workpiece structure;

[0037] Figure 5 It is a cross-sectional view of the conductive joint structure.

[0038] In the attached picture:

[0039] 1-shielding workpiece, 2-piston rod, 3-electroplating hanging plate, 4-adjusting bracket, 5-positioning and clamping device, 6-conductive joint. DETAILED DESCRIPTION

[0040] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary implementation modes of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0041] Example 1

[0042] like Figure 1 As shown, a plating hanger for a piston rod of an automobile shock absorber, the plating hanger comprising: a shielding workpiece for sleeved on a plating section of a Class B diameter to limit the flow of a plating solution;

[0043] The electroplating section of the piston rod includes an electroplating section of type A diameter and an electroplating section of type B diameter, and the electroplating section of type B diameter includes an electroplating section of at least one diameter, wherein the diameter of the electroplating section of type A diameter is greater than the diameter of all the electroplating sections of type B diameter. The shielding workpiece is a hollow cylinder, and the shielding workpiece is provided with flow holes for limiting the flow of the electroplating liquid. When the electroplating section of type B diameter has electroplating sections of various diameters, the shielding workpiece has shielding sections of various diameters corresponding to the electroplating sections of various diameters. The flow holes for limiting the flow of the electroplating liquid are circular holes. On the protruding cross-section of the shielding section with the largest diameter, a plurality of identical vertical direct current holes are evenly provided along the height direction to connect the upper and lower bases of the shielding section. The centers of the cross-sections of all the vertical direct current holes connecting the upper and lower bases of the shielding section are on the same circumference.

[0044] like Figure 3 As shown, a car shock absorber piston rod electroplating system includes a shielding workpiece 1, a piston rod 2, an electroplating hanging plate 3, an adjustment bracket 4, a positioning and clamping device 5 and a conductive joint 6; Figure 2 As shown, the piston rod is a cylinder with various diameters, and the electroplated section of the piston rod includes an electroplated section with a class A diameter and an electroplated section with a class B diameter, wherein the electroplated section with a class B diameter includes (Φ10, Φ10.4, Φ12.5 sections), and the size of the electroplated section with a class B diameter after electroplating is specified to be (Φ10.2, Φ10.6, Φ12.536).

[0045] Figure 4 The shielding workpiece shown in the figure corresponds to the electroplated sections of the above-mentioned Class B diameter (Φ10, Φ10.4, Φ12.5 sections); the inner hole size of the shielding workpiece is increased from Φ12.2 to Φ16. The top of the shielding workpiece is installed on the positioning and clamping device through a nut. The non-electroplated section is completely shielded during the electroplating process. The non-electroplated section at the top of the piston rod corresponds to Figure 4 The Φ12.2 section in the A-type diameter section is not shielded, and the Φ10 section in the B-type diameter electroplating section is Figure 4 The Φ16 section of the shielding workpiece corresponds to 24 Φ6 circular holes evenly distributed on the shielding workpiece; the Φ10.4 section corresponds to Figure 4 In the middle Φ44 section, 8 Φ8 circular holes are evenly distributed on the shielding workpiece in this section, and 6 Φ5 vertical circular holes are evenly opened along the height direction on the protruding cross section where the shielding workpiece in this section is connected with the adjacent shielding workpiece above;

[0046] The adjustment bracket 4 is horizontally installed on the electroplating hanging plate 3 and can move up and down. The adjustment bracket 4 is non-conductive. There are at least 4 groups of positioning and clamping devices 5 evenly distributed and vertically installed on the electroplating hanging plate 3. All positioning and clamping devices 5 pass through the adjustment bracket 4 and are perpendicular to the adjustment bracket 4. The conductive connectors 6 corresponding to the positioning and clamping devices 5 are vertically installed at the bottom end of the electroplating hanging plate 3.

[0047] like Figure 5 As shown, the conductive joint 6 is a hollow cylinder, and the inner diameter of the conductive joint 6 is determined by the diameter of the non-electroplated section of the piston rod. The side of the conductive joint 6 is coated with 3mm green groove glue, and the exposed interface part of the conductive joint is not coated with 3mm green groove glue.

[0048] Install the small end of the piston rod into the conductive joint, and the large end into the shielding workpiece and assemble them in place. Adjust the bracket so that the connecting rod of the positioning and clamping device is in the middle position. If the piston rod does not shake when gently shaken by hand, it is considered qualified. Then lock the adjustment bracket. By controlling the electroplating parameters (current density 40-70A / dm2, chromic acid concentration 260±40g / l, sulfuric acid concentration 3.5±1.5g / l, trivalent chromium ion concentration, 2±1g / l, chloride <60mg / L, temperature 60±5℃, electroplating time 1800-2700s, iron ions ≤8g / l, copper ions ≤2.5g / l), the electric line density is controlled to disperse from the opening position into the shielding part to produce an electrochemical reaction with the piston rod to form a thinner coating, thereby achieving and meeting the technical requirements for piston rod electroplating.

[0049] Example 2

[0050] A method for electroplating a piston rod of an automobile shock absorber, characterized in that the method comprises:

[0051] S1. Determine the current density and electroplating time according to the required dimensions of the piston rod before and after electroplating;

[0052] S2. Designing a corresponding shielding workpiece of the piston rod electroplating section according to the determined current density and electroplating time;

[0053] S3. The shielding workpiece is set at the position corresponding to the piston rod;

[0054] S4. Install one end of the piston rod on the conductive joint and the other end in the positioning and clamping device, adjust and fix the positioning and clamping device and the adjustment bracket;

[0055] S5. Control the electroplating parameters and electric line density to start the electroplating work.

[0056] like Figure 3 As shown, during use, the small end of the piston rod is installed into the conductive joint, and the large end is installed into the shielding workpiece and assembled in place. By adjusting the adjustment bracket, the connecting rod of the positioning and clamping device is in the middle position. If the piston rod does not shake when gently shaken by hand, it is judged that the installation is qualified. Lock the bolts of the adjustment bracket, control the electroplating parameters and power line density, and start the electroplating work.

[0057] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for electroplating a piston rod of an automobile shock absorber, It is characterized in that The method is implemented based on an electroplating hanger for a piston rod of an automobile shock absorber; The electroplating rack comprises: a shielding workpiece for sleeved on the electroplating section of Class B diameter to limit the flow of the electroplating solution; The electroplated section of the piston rod includes an electroplated section of type A diameter and an electroplated section of type B diameter, and the electroplated section of type B diameter includes an electroplated section of at least one diameter, wherein the diameter of the electroplated section of type A diameter is greater than the diameter of all the electroplated sections of the electroplated section of type B diameter; The shielding workpiece is a hollow cylinder, and a flow hole for limiting the flow of the electroplating solution is opened on the shielding workpiece; When the electroplating segments of type B diameter include electroplating segments of various diameters, the shielding workpiece includes shielding segments of various diameters corresponding to the electroplating segments of various diameters; On the protruding cross section of the shielding segment with the largest diameter, a plurality of identical vertical direct current holes are evenly opened along the height direction to connect the upper bottom and the lower bottom of the shielding segment; The method comprises: S1. Determine the current density and electroplating time according to the required dimensions of the piston rod before and after electroplating; S2. Designing a corresponding shielding workpiece of the piston rod electroplating section according to the determined current density and electroplating time; S3. The shielding workpiece is set at the position corresponding to the piston rod; S4. Install one end of the piston rod on the conductive joint and the other end in the positioning and clamping device, adjust and fix the positioning and clamping device and the adjustment bracket; S5. Control the electroplating parameters and electric line density to start the electroplating work.

2. A method for electroplating a piston rod of an automobile shock absorber according to claim 1, It is characterized in that The flow hole for limiting the flow of the electroplating solution is a circular hole.

3. The electroplating method for automobile shock absorber piston rod according to claim 1, It is characterized in that The centers of the cross sections of all vertical direct current holes connecting the upper and lower bases of the shielding section are on the same circumference.

4. An automotive shock absorber piston rod electroplating system, It is characterized in that A method for electroplating a piston rod of an automobile shock absorber according to any one of claims 1 to 3, the system comprising a shielding workpiece (1), a piston rod (2), an electroplating hanging plate (3), an adjustment bracket (4), a positioning and clamping device (5) and a conductive joint (6); The piston rod is a cylinder with various diameters, the electroplated section of the piston rod includes an electroplated section with a diameter of type A and an electroplated section with a diameter of type B, and the shielding workpiece (1) corresponds to and matches the electroplated section with a diameter of type B; The adjusting bracket (4) is horizontally mounted on the electroplating hanging plate (3) and can move up and down, and the adjusting bracket (4) is non-conductive; at least four groups of positioning and clamping devices (5) are evenly distributed and vertically mounted on the electroplating hanging plate (3), and all the positioning and clamping devices (5) pass through the adjusting bracket (4) and are perpendicular to the adjusting bracket (4); and conductive connectors (6) corresponding to the positioning and clamping devices (5) are vertically mounted at the bottom end of the electroplating hanging plate (3).

5. The automobile shock absorber piston rod electroplating system according to claim 4, It is characterized in that The conductive joint (6) is a hollow cylinder, and the inner diameter of the conductive joint (6) is determined by the diameter of the non-electroplating section of the piston rod.

6. The automobile shock absorber piston rod electroplating system according to claim 5, It is characterized in that The side of the conductive joint (6) is coated with 3 mm thick green groove glue.

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